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9-108 PPC405 Core User’s Manual
mcrxr
Move to Condition Register from XER
9.Instruction Setmcrxr
Move to Condition Register from XER
n ← BF
(CR[CRn])
← XER
0:3
XER
0:3
←
4
0
The contents of XER
0:3
are placed into the CR field specified by the BF field. XER
0:3
are then set to 0.
This transfer is positional, by bit number, so the mnemonics associated with each bit are changed.
See Table 9-18 for clarification.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
• CR[CR
n
] where
n
is specified by the BF field.
• XER[SO, OV, CA]
Invalid Instruction Forms
• Reserved fields
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
mcrxr BF
31 BF 512
069 21 31
Table 9-18. Transfer Bit Mnemonic Assignment
Bit XER Usage CR Usage
0SO LT
1OV GT
2CA EQ
3 Reserved SO